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DOI: 10.5593/SGEM2016/HB33/S02.001

1D/2D NUMERICAL MODELING OF A HIGH-WATER FLOW

M. A. GHITESCU, A.T. CONSTANTIN, Gh.I. LAZAR, A.I. POPESCU-BUSAN, S.V. NICOARA
Friday 11 November 2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, SGEM Vienna GREEN Extended Scientific Sessions, www.sgemviennagreen.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-81-0 / ISSN 1314-2704, 2 - 5 November, 2016, Book 3 Vol. 3, 3-10pp, DOI: 10.5593/SGEM2016/HB33/S02.001

ABSTRACT

As common circumstances, the urban developments, either for residential purposes or with economical destination, become to cover land areas initially outside town boundaries, which had the most a farming employment. If the targeted areas also represent the flood plains of a river course, protected or not by alongside embankments (corresponding to the former protection rank), the problem regarding the flooding possibility of future objects needs to be considered. The paper presents a numerical simulation of a special hydroflow on Timiș River lower course (West plain of Romania) along the given stretch from the Town of Lugoj towards the Coșteiu Hydrotechnical Arrangement. A specific high-water flow development was considered by configuring a hydrograph of outstanding values for this river, registered on the beginning of April, 2000. The flow simulation aims to estimate the water volumes possible to be discharged by over-spilling the side framing embankment, as well as to supply a graphic time development of a consequently flooding in the adjacent plain, an area engaged on the industrial business expansion of town outskirts. The simulation along the given stretch of the river flood plain was performed in a 1D model by HEC–RAS 4.1 and also by employing distinctive modules of HEC–GEORAS 4.3 (embedded in ArcMAP 9.3). As for the 2D modelling of the affected space aside the river course, there was defined a specific polygonal surface attached further on as a side structure and meshed by discrete elements. Following specific post-processing operations, the numerical results were overlaid to the 1D and 2D models geometrical data in order to be graphically interpreted by the help of RasMapper module.

Keywords: river engineering, flow, flooding, water flow modelling

PAPER DOI: 10.5593/SGEM2016/HB33/S02.001, 1D/2D NUMERICAL MODELING OF A HIGH-WATER FLOW

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